Hydrophobicity live-line test method for composite insulator of power transmission line

Abstract

The invention discloses a hydrophobicity live-line test method for a composite insulator of a power transmission line. The method comprises the following steps: collecting a composite insulator watercoating image and a corresponding hydrophobicity grade to establish a sample data set; constructing a convolutional neural network model based on VGGNet, and training the convolutional neural networkmodel by using the sample data set to obtain a composite insulator hydrophobicity grade judgment model; calculating the flight safety distance of the unmanned aerial vehicle according to the electromagnetic field disturbance state of the unmanned aerial vehicle around the power transmission line; enabling the unmanned aerial vehicle to fly in the power transmission line according to the flight safety distance to acquire a new composite insulator water-covering image, and based on the composite insulator hydrophobicity grade judgment model, adopting a grid analysis method to carry out hydrophobicity grade judgment on the new composite insulator water-covering image, so a composite insulator hydrophobicity grade distribution diagram can be obtained. According to the method, the hydrophobicity grade of the composite insulator can be directly judged.

Description

technical field [0001] The invention belongs to the technical field of power grid equipment state detection, and in particular relates to a method for testing the hydrophobic electrification of composite insulators of power transmission lines. Background technique [0002] Hydrophobicity detection is an important means to judge the anti-pollution flashover performance of composite insulators, and regular hydrophobicity detection of grid-hung composite insulators is an important guarantee to ensure the safe operation of the power grid. In engineering applications, the water spray classification method is often used for hydrophobicity detection, that is, by spraying water on the surface of the shed of the composite insulator, and judging the level of hydrophobicity according to the distribution of water droplets on the surface of the shed, this method is simple to operate and easy to implement , and is the most widely used. However, the traditional water spray classification ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low efficiency and poor accuracy of the traditional composite insulator hydrophobicity detection method, the present invention proposes a hydrophobic live test method for composite insulators of transmission lines, which replaces the manual climbing hydrophobicity detection operation mode and gets rid of experience dependence. The detection safety and detection efficiency are improved, and the composite insulator hydrophobicity level judgment model constructed can analyze and process the water-covered image of the target insulator in real time, and quickly identify the hydrophobicity level of the composite insulator

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